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二、用增加纵梁或拱肋的方法加固桥梁上部结构当桥梁上部结构基本完好,但承载力不能满足要求或需予提高、或同时要求加宽桥面时,一般常采用增加纵梁或拱肋的方法加固。对于梁桥,增加的新梁在桥面不需加宽时,布置在原中梁两侧(例22);在提高承载力的同时并要求加宽桥面时,新梁与旧梁按重新设计的位置布置,如将原梁分别平移
Second, by increasing the vertical beam or arch ribs to enhance the structure of the upper bridge When the upper part of the bridge structure intact, but the carrying capacity can not meet the requirements or needs to be improved, or at the same time require wider bridge deck, the general increase of the longitudinal beam or arch Rib method of reinforcement. For beam bridges, the new beams added are arranged on both sides of the original center beam (Example 22) without widening the bridge deck. When the bridge deck is required to be widened while increasing the bearing capacity, the new beam and old beam are redesigned The location of the layout, such as the original beam translation